Coupling for pipes



entre stares PATENT WILLIAM H. FULTON, OF IRVINGTON, NEW JERSEY,ASSIGNOR TO TITEFALEX METAL HOSE CORPORATION, A CORPORATION OF NEW YORK.

courante non rires'.

Application led August 15, 1919.

by the hose or pipe may be attached to a l terminal fitting or toanother length of pipe which shall be efficient in-operation.

either fiexible or stif.

In my application Serial Number 218,205, filed February 20th, 1918, Ihave shown and described an improved pipe coupling for the purposesspecified. The present invention, like that of my prior application,avails of the pressure of the fluid in the pipe to secure the hose tothe fitting, and accord# ing to the present invention also, increase inpressure of the fluid causes the hose the more firmly to be secured tothe fitting and opposition to disruption or leakage is increased. It hasbeen found, however; that it is often ditlicult, particularly in thecase ofjheavy hose or of hose not possessing a high degree offlexibility, to manipulate integral parts of the hose to. properlycoperate with the hose in joining it tothe coupling so that such joiningofthe hose, even when it is heavy or comparatively stiffl isfacilitated; In fact it may be accomplished when the hose or pipe isrigidly stiff. The present invention may therefore be said to :be an`improvement upon the device of myl prior application above referred to;

The main object of this invention is to provide a pipe or hose couplingwhich shall facilitate the formation of the coupling and Other andancillary objects of the inventionwill appear hereinafter.

In the accompanying drawings which Y illustrate the invention- Figure 1is a longitudinal .central section of a coupling embodying theinvention; and

Fig. 2 is asection onthe. line 2-2 of Fig. 1. l

eferring to the drawin s, the fittin comprises a body portion 1, avilnga Hui passage 2 and tubular extension 3, which is surrounded by a sleeve4 screw-threaded at 5 to the body 1. To avoid leakage a pack-Specification of ltetters Patent.

Patented Feb. 15, 1921.,

serial No. 317,643.

ing ring 6 may be inserted between the end of the sleeve 4 and thefitting body. Between the sleeve 4 and the extension 3 is formed achamber which is in communication with the fiuid passage. At the end ofthe fitting opposite the extension 3 is formed an enlarged bore orsocket 8 adapted to rel ceive an armor 9 for the flexible hose or pipe10 of rubber.. rIhe armor may consist in a tube formed of a helicallywound metal strip having the edges of adjacent convolutions interfoldedand clearance provided in the interfold so that there may be sliding 1nthe `joints to provide-fiexibility of the armor tube. The structure ofthis character of tube is well known in the art and need This ferruleholds the tube in proper posi- Y tion at all times whether pressure ison or off. When fluid under pressure is passed through the apparatus itbearsI upon the outside of the band 12 and presses it against Y theextension?) and also the end of the hose or pipe 10. cIn this manner afluid tlght joint 1s formed between the fitting and the pipe 10; As thefluid pressure increases the pressure upon the band 12 is increased'andit is the lmorefirmly pressed against the eX- tension Sand the end ofthe pipe 10, so that the joint is madeI even more secure against leakageIt will thus be seen that with increase of the fluid pressure within theAdevice, the joint between the fitting and pipe is more tightly securedso that the structure is well adapted for use with 'very high`pressures.

While the invention has been illustrated in what is considered its bestapplication, it may have other embodiments without departing from itsspirit and is not, therefore, limited to the structure shown in thedrawin What I claim is: l 1. The combination withl a fitting having 2.The combination with a fitting having a fluid passage and a tubularextension about said passa e, of a tube or pipe extending through saidpassage, a flexible member separate from said pipe or tube and forcedagainst said extension and said pipe or tube by the pressure of thefluid in said passage.

3. The combination with a fitting having a fluid passage, a tubularextension about said passage and a sleeve surrounding said extension,and spaced therefrom to form a chamber communicating With said passage,

- of a tube or pipe extending through said passage, and a flexiblemember separate from said pipe or tube, surrounding said pipe or tubeand said extension, and forced against said extension and said pipe ortubo by the fluid pressure of saidpassage.

4. The combination with a fitting having a fluid passage of af pipe ortube extending through said passage, an armor surrounding saidgpipe ortubeand secured to said fitting, and a flexible member ,separate fromsaid pipe or tube and forced against both the fitting and said pipe ortube, to form a fluid tight joint therebetween, by the fluid pressure ofsaid passage.

5. The combination With a fitting having a fluid passage, of a flexibletube extending through said passage, a sleeve Within said tube and aflexible member engaging said tube about said sleeve and forced againstsaid tube and fitting by the fluid pressure of said passage.

6. The combination With a fitting having a fluid passage, of a flexibletube extending through. said passage, a flanged ferrule or sleeveentered Within the end 0f said tube,

and a flexible member engaging with said f tube and fitting and forcedthereagainst to form a. fluid tight joint therebetween by the vfluidpressure in said passage.

7. The combination with a fitting having a fluid passage and a tubularextensio-n about said passage, of a flexible tube extending through saidpassage, a ferrule inserted within lthe end of said tube, and a flexibleband surrounding said extension and that portion of the tube restingupon the ferrule, said band being forced against said extension and tubeto form a fluid tight joint by the fluid pressure of said passage.

In testimony whereof I have signed this specication this 14th day ofAugust, 1919.

` WLLIAM H. FULTON.

